Why it works: Sugar and flour are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 92,116 recipes. Both carry phenylacetaldehyde, which smells hawthorne, honey. The science ↓
Egg Rolls
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the potato mixture
Peel the potatoes and boil until done, then mash the potatoes.
Strain into boiling water to make 1 pint.
Let the mixture cool completely.
Add beaten eggs, sugar, and yeast cake and mix thoroughly.
Let ferment for 2 to 3 hours.
Make the dough
Sift the flour.
Add salt and lard and mix well.
Combine with fermented mixture and knead thoroughly.
Shape into rolls.
Let rise until light.
Bake
Bake in a hot oven at 400°F (200°C) for 1 to 2 hours.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Potato + flourtop 15% of all pairsSmell alikemoderateCooked together5,355 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Egg + sugartop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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Potato + eggtop 29% of all pairsSmell alikemoderateCooked together4,978 recipes
Shared aroma: (e)-2-octenal (fatty, green).
Egg and flour barely smell alike, yet cooks put them together in 106,462 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Mashed into the mixture, they add moisture and a soft, tender crumb.
- Eggs
- Add structure and richness, helping the rolls hold their shape and color.
- Sugar
- Feeds the yeast during fermentation and adds sweetness and browning.
- Yeast cake
- Ferments the mixture, producing gas that makes the rolls rise and become light.
- Flour
- Forms the gluten network that gives the dough its structure and chew.
- Lard
- Adds fat, tenderizing the crumb and giving a softer texture.
The step that matters
Let the mixture cool completely before adding the yeast cake and eggs. Yeast is killed by hot liquid, so if the strained potato mixture is still warm when the yeast cake goes in, fermentation may fail and the rolls will not rise well.
Swap the potato
How well each one fits the dish's main ingredients (egg, sugar, flour):
- Arrowrootfits better
- Sweet potatofits better
- Shallotfits better
- Potatothe original
Fit is the average pairing score against egg, sugar, flour. Candidates are from the same food group and used in at least 100 recipes.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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